From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0B62EC433E0 for ; Fri, 5 Feb 2021 15:06:38 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5C99C6509A for ; Fri, 5 Feb 2021 15:06:37 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5C99C6509A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=virtualization-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 14F5286B4E; Fri, 5 Feb 2021 15:06:37 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VNeIYScQR1du; Fri, 5 Feb 2021 15:06:35 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 39CB386B08; Fri, 5 Feb 2021 15:06:35 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 0CFA6C1E6F; Fri, 5 Feb 2021 15:06:35 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id CB0E2C013A for ; Fri, 5 Feb 2021 15:06:33 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id BAA2487035 for ; Fri, 5 Feb 2021 15:06:33 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lGO3B+AMMNyq for ; Fri, 5 Feb 2021 15:06:33 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mx2.suse.de (mx2.suse.de [195.135.220.15]) by hemlock.osuosl.org (Postfix) with ESMTPS id CD83E87074 for ; Fri, 5 Feb 2021 15:06:32 +0000 (UTC) X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 6AFD4AC43; Fri, 5 Feb 2021 15:06:30 +0000 (UTC) From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@linux.ie, maarten.lankhorst@linux.intel.com, mripard@kernel.org, kraxel@redhat.com, hdegoede@redhat.com, sean@poorly.run, sam@ravnborg.org, noralf@tronnes.org Subject: [PATCH v2 0/7] drm: Move vmap out of commit tail for SHMEM-based drivers Date: Fri, 5 Feb 2021 16:06:21 +0100 Message-Id: <20210205150628.28072-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.30.0 MIME-Version: 1.0 Cc: Thomas Zimmermann , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org X-BeenThere: virtualization@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux virtualization List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" Several SHMEM-based drivers use the BO as shadow buffer for the real framebuffer memory. Damage handling requires a vmap of the BO memory. But vmap/vunmap can acquire the dma-buf reservation lock, which is not allowed in commit tails. This patchset introduces a set of helpers that implement vmap/vunmap in the plane's prepare_fb and cleanup_fb; and provide the mapping's address to commit-tail functions. Wrappers for simple KMS are provides, as all of the involved drivers are built upon simple-KMS helpers. Patch 1 adds the support for private plane state to the simple-KMS helper library. Patches 2 and 3 provide plane state for shadow-buffered planes. It's a DRM plane with BO mappings into kernel address space. The involved helpers take care of the details. The code is independent from GEM SHMEM and can be used with other shadow-buffered planes. I put all this in a new file. In a later patch, drm_gem_fb_prepare_fb() et al could be moved there as well. Patches 4 to 7 convert each involved driver to the new helpers. The vmap operations are being removed from commit-tail functions. An additional benefit is that vmap errors are now detected before the commit starts. The original commit-tail functions could not handle failed vmap operations. I smoke-tested the code by running fbdev, Xorg and weston with the converted mgag200 driver. v2: * export drm_gem_vmap()/_vunmap() (kernel test robot) * make duplicate_state interface compatible with struct drm_plane_funcs Thomas Zimmermann (7): drm/simple-kms: Add plane-state helpers drm/gem: Export drm_gem_vmap() and drm_gem_vunmap() drm: Add additional atomic helpers for shadow-buffered planes drm/mgag200: Move vmap out of commit tail drm/cirrus: Move vmap out of commit tail drm/gm12u320: Move vmap out of commit tail drm/udl: Move vmap out of commit tail Documentation/gpu/drm-kms-helpers.rst | 12 ++ drivers/gpu/drm/Makefile | 3 +- drivers/gpu/drm/drm_gem.c | 2 + drivers/gpu/drm/drm_gem_atomic_helper.c | 208 ++++++++++++++++++++++++ drivers/gpu/drm/drm_simple_kms_helper.c | 40 ++++- drivers/gpu/drm/mgag200/mgag200_mode.c | 23 +-- drivers/gpu/drm/tiny/cirrus.c | 43 ++--- drivers/gpu/drm/tiny/gm12u320.c | 28 ++-- drivers/gpu/drm/udl/udl_modeset.c | 34 ++-- include/drm/drm_gem_atomic_helper.h | 73 +++++++++ include/drm/drm_simple_kms_helper.h | 27 +++ 11 files changed, 412 insertions(+), 81 deletions(-) create mode 100644 drivers/gpu/drm/drm_gem_atomic_helper.c create mode 100644 include/drm/drm_gem_atomic_helper.h base-commit: f9173d6435c6a9bb0b0076ebf9122d876da208ae prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d prerequisite-patch-id: f8140f08b77c49beb6243d9a2a88ebcc7097e391 prerequisite-patch-id: 6bffaf03d01daeb29a0b0ffbc78b415e72907a17 prerequisite-patch-id: 6386ca949b8b677a7eada2672990dab2f84f734f prerequisite-patch-id: 706e35d0b2185d2332f725e1c22d8ffed910ea7b prerequisite-patch-id: e30631cc73b905efa477be3f56daf1ff5112fe03 -- 2.30.0 _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization